Author: Jackie Chen

Puppet User and Group Configuration Example


1) Create a user node "UT-9c8e99e3959e"{         user { 'john':         ensure   => 'present',         managehome => true,         password => '$6$gQtfKwwf$riyyLGkm2EtsUjkG03SPhE/PfcrmqDaTrZ1kayHao8s3J1xr8WuC3gWdceFu1RGfCOslh5jSDy8x4xeVx3xYc/'         } } Example: generic@UT-9c8e99e3959e:~$ cat /etc/passwd | grep john generic@UT-9c8e99e3959e:~$ sudo puppet agent --test info: Caching catalog for ut-9c8e99e3959e info: Applying configuration version '1362628656' notice: /Stage[main]//Node[ut-9c8e99e3959e]/User[john]/ensure: created notice: Finished catalog run in … Continue reading Puppet User and Group Configuration Example →

Puppet Service Configuration Example


1) Ensure service is always running node "UT-9c8e99e3959e"{ service { "cron":         enable => true,         ensure => "running",         } }   Example: generic@UT-9c8e99e3959e:~$ sudo service cron status cron stop/waiting generic@UT-9c8e99e3959e:~$ sudo puppet agent --test info: Caching catalog for ut-9c8e99e3959e info: Applying configuration version '1362528911' notice: /Stage[main]//Node[ut-9c8e99e3959e]/Service[cron]/ensure: ensure changed 'stopped' … Continue reading Puppet Service Configuration Example →

Spacewalk Installation Step by Step


To evaluate Spacewalk, I have installed it in my lab. Spacewalk Server: RHEL01 (RHEL5.5/ 1vCPU/ 2G vRAM/ 20G vHDD) Spacewalk Client:  RHEL02 (RHEL5.5/ 1vCPU/ 1G vRAM/ 8G vHDD) Install Spacewalk Server 1) Install the Spacewalk Server yum repo rpm -Uvh http://spacewalk.redhat.com/yum/1.8/RHEL/5/i386/spacewalk-repo-1.8-4.el5.noarch.rpm 2) Install EPEL yum repo rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm 3) Install Spacewalk server and its dependencies yum … Continue reading Spacewalk Installation Step by Step →

Compile Linux Kernel in Ubuntu


The new Linux kernel 3.7.9 has been released last week. Here is how I compiled it in my Ubuntu laptop.1) Install the prerequisites.jchen@JC:~$ sudo apt-get install git-core libncurses5 libncurses5-dev libelf-dev asciidoc binutils-dev linux-source libncurses5 libncurses5-dev fakeroot build-essential crash kexec-tools makedumpfile kernel-wedge kernel-package2) Check the current kernel version.jchen@JC:~$ uname -r3.5.0-25-generic3) Download the kernel 3.7.9jchen@JC:~/Downloads$ wget http://www.kernel.org/pub/linux/kernel/v3.0/linux-3.7.9.tar.bz24) … Continue reading Compile Linux Kernel in Ubuntu →